【Demo】Base64编码图片转json的效果对比

public class Test {
    public static void main(String[] args) throws IOException {
        byte[] data = Test.getFileByte();
        System.out.println("压缩前的大小:" + data.length / 1024.0 + " KB");
        //压缩
        byte[] resByte = Test.gzipFile(data);
        System.out.println("压缩以后的大小:" + resByte.length / 1024.0 + " KB");

        //base64
        String encode = Base64.getEncoder().encodeToString(resByte);
        System.out.println("base64以后的大小:" + encode.length() / 1024.0 + " KB");

        String json1 = GsonUtils.toJson(data);
        System.out.println("原始数据转json大小:" + json1.length() / 1024.0 + " KB");
        String json2 = GsonUtils.toJson(resByte);
        System.out.println("压缩后转json大小:" + json2.length() / 1024.0 + " KB");
        String json3 = GsonUtils.toJson(encode);
        System.out.println("压缩并base64以后转json大小:" + json3.length() / 1024.0
            + " KB");
        System.out.println((double) json1.length() / data.length + " 倍");
        System.out.println((double) json2.length() / data.length + " 倍");
        System.out.println((double) json3.length() / data.length + " 倍");

    }

    private static byte[] gzipFile(byte[] data) throws IOException {
        ByteArrayOutputStream bos1 = new ByteArrayOutputStream();

        GZIPOutputStream gzip = new GZIPOutputStream(bos1);
        gzip.write(data);

        gzip.flush();
        gzip.close();
        gzip.finish();

        return bos1.toByteArray();
    }

    private static byte[] getFileByte() throws IOException {
        String path = "D:\111.png";
        File file = new File(path);
        InputStream fis = null;
        ByteArrayOutputStream bos = null;
        byte[] data = new byte[0];
        try {
            fis = new FileInputStream(file);

            bos = new ByteArrayOutputStream((int) file.length());

            byte[] buf = new byte[1024];
            int len = -1;
            while ((len = fis.read(buf)) != -1) {
                bos.write(buf, 0, len);
            }
            data = bos.toByteArray();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bos != null) {
                bos.close();
            }

            if (fis != null) {
                fis.close();
            }
        }
        return data;
    }
}

结果：
压缩前的大小:1.9638671875 KB
压缩以后的大小:1.97265625 KB
base64以后的大小:2.6328125 KB
原始数据转json大小:7.1806640625 KB
压缩后转json大小:7.263671875 KB
压缩并base64以后转json大小:2.64453125 KB
3.6563898557931376 倍
3.6986573843858777 倍
1.3465937344604675 倍